Device for bending special shapes of tubes or pipes.



Patented Jan. l6, I900.

Q fiHHHHnHHWw C. R. MGKIBBEN.

DEVICE FOR BENDINGSPECIAL SHAPES 0F TUBES 0R PIPES..

(Application filed Feb 24, 1899.]

(No Model.)

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CHARLES R. MOKIBBEN, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO SHOOK,ANDERSON MANUFACTURING 00., OF SAME PLACE.

DEVICE FOR BENDING SPECIAL SHAPES OF TUBES OR PIPES.

SPECIFICATION forming part of Letters Patent No. 641,535, dated January16, 1900.

Application filed February 24, 1899. Serial No. 706,732. (No model.)

To all whom it may concern:

Be it known that LCHARLES R. MOKIBBEN, a citizen of the United States ofAmerica, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented oertain new and useful Improvements inDevices for Bending Special Shapes of Tubes or Pipes; and I do herebydeclare the following to be a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, which form apart of this specification.

My invention relates to an improved device for bending special shapes oftubes or pipes; and it consists in forming a bed-plate the contour ofwhich will correspond to that of the finished article and providing aremovable die or block for each bend of the pipe or tube; also, a meansfor securing the said dies or blocks to the bed-plate also, a lever ormeans for bending the pipe or tube to the shape of the said dies orblocks, together with the certain details of construction andcombination of parts, as will be fully described hereinafter.

In the accompanying drawings, Figure 1 is a plan View of my improveddevice for bending tubes or pipes, which is constructed and arranged inaccordance with my invention, the said View showing by means of dottedlines the several stages or bends of the pipe. Fig. 2 is a side view ofthe same. Fig. 3 is an end elevation. Figs. 4 and 5 are respectivelyaplan and a side elevation of one of the removable dies or forms overwhich the pipe or tube is bent.

To construct an apparatus in accordance with my invention, I provide abed-plate 1 of a suitable size and form of construction, said plateconsisting of a slab of metal comprising one or more pieces formedsomewhat to correspond to the shape of the pipe or tube 8 when finished.This bed-plate 1 is provided with radial slots 3, formed at certainpredetermined intervals corresponding to the several bends formed in thefinished pipe 8, and the said slots 3, used for the reception of a bolt6, acting as the purchase of a long and powerful lever 10, which,together with the operatiomwill be hereinafter f ullydescribed. Arrangedabout and secured to this bed-plate 1 is a series of removable dies orformer-blocks 11, 11, 11", and 11, each of which consists of a block orpiece of metal formed in the arc of a circle analogous with thatparticular bend or curve given to the pipe or tube at a certain point.This former-block 11 is provided above its periphery with a shallowgroove 12, conforming to the radius of the pipe 8 being bent, and thesaid block held and confined rigidly in position by means of pins 16,passing through lugs 13, integral with the said plate. These pins 16pass through the lugs 13and also through the bed-plate 1 and may bewithdrawn or replaced at will. To center each of these blocks 11, thesame is provided with a depending bolt provided with a head 5, which isentered into a narrow slot 3 for the reception of the bolt. An enlargedslot 4: beneath receives the head 5 in such a manner that when the saidblock 11 is in position the same will be prevented from rising whensubjected to any great lateral pressure.

Attached to one extremity of a suitable lever 10 is abolt or pin 6,acting as a fulcrum and arranged at right angles to its length, whichmaybe entered and confined in any one of the slots 3, 3, 3", and 3', thesaid lever 10 being provided with a pivoted or journaled grooved wheel 7some distance from the said fulcrum. By'means of this lever 10 andgrooved wheel 7 the various bends given to the pipe 8 (shown at Fig. 1of the drawings) mayeasily be made.

In operation the special form or contour of the pipe or tube 8 (shown atFig. 1) is received in certain lengths and in a straight form. The oneend is placed between the first formerblock 11 and a lug 15,castintegralwith the bedplate 1, the first block 11 being in position, all theothers being removed. The fulcrum-pin 6 of the lever 10 is engaged withthe slot 3 and the wheel 7 in close contact with the pipe 8. By pressureupon the said lever the pipe 8 is bent around the former-block to theposition shown and indicated on the drawings as first bend. After thisbend has been made the second former-block 11' is placed and secured inposition (by means of the bolt 5 and pins 16) and the fulcrum 6 of thelever changed to the slot 3. Then by applying pressure to the lever 10the bend is made about the said block 11, corresponding to that shownand described as the second bend on the drawings. The third former block11" is now placed in position and the fulcrum 6 of the lever 10 removedto the slot 3 and the third bend made. Then the same process is repeatedby placing the formerblock 11 in position and moving the fulcrum of thelever to the slot 3. It will be readily seen that any number of bendsmay be formed by means of these removable former-blocks, as abovedescribed. Therefore-I do not confine myself to the exact constructionshown and described.

WVhat I claim, and desire to secure by Letters Patent, is-

1. Abending apparatus consisting of a bedplate provided with a series offulcrum-slots, a series of former-blocks detachably secured to the saidbed-plate, said former-blocks consisting of a block of metal formed inthe arc of a circle analogous to the bend of or curve to be given to thearticle to be bent, and being provided at its periphery with a groove,and havinglugs provided each with a hole whereby the said former isattached to the bed-plate, and a bending-lever capable of being removedfrom, one of the said fulcrum-slots to another, substantially asdescribed.

2. Abending apparatus consisting of a bedplate having detachably securedthereon a series of alternately-arranged former'blocks,

said bedplate being provided at opposite sides with fulcrum-slots, incombination with a bending-lever capable of being removed from one toanother of said fulcrum-slots, and provided with means whereby it may besecured in any one of the said fulcrum-slots, said means consisting of afulcrum-bolt attachecl to the extremity of the said bendinglever, andarranged at right angles thereto, substantially as described.

3. A bending apparatus consisting of a bedplate provided at oppositesides with fulcrumslots, a series of alternately-arranged formerblocksdetachably secured to the said bedplate, said former-blocks being formedanalogous to the desired bend of or curve to be given the article to bebent and being provided with a peripheral groove, lugs at each end ofsaid former-blocks each provided with a hole,and a centering-boltextending through each of the said former-blocks and into the bed-plate,and a bending-lever capable of be ing removed from one of saidfulcrum-slots to another.

In testimony whereof I have hereunto atfixed my signature in thepresence of two subscribing Witnesses.

CHARLES R. MoKlll'lEN.

\Vitnesses:

JOHN Gnonrrzmonn, J os. L. SHINING.

